Method and device for weaving on looms with gripper shuttles



May 13, I947. A. MOESSINGQVER METHOD AND DEVICE FOR WEAVING ON LOOMS WITH GRIPPER SHUTTLES Filed March 9, 1944 5 Sheets-Sheet l ALBERT osss/NGEJe, 1 v If! ATTO NEK y 1947. A. Mo'ssmGER 2,420,380

METHOD AND DEVICE FOR WEAVING ON LOOKS WITH GRIPPER SHUTTLES Filed March 9, 1944 s'shets-sneet 2 IN w n/wk.

ALBERT Mo SINGER. BY

. nromvcr 1 1947- A. MOESSINGER 2,420,380

METHOD AND DEVICE FOR WEAVING 0N LOOMS WITH GRIPPER SHUI'TLES ,Fi'led March 9, 1944 5 Sheets-Sheet 3 ALBERT MifjS/NGER.

A TTSRNEK May 13, 1947. MOESSINGER 7 METHOD DEVICE FOR WEAVING ON LOOMS WITH GRIPPER SHUTTLES Filed March 9, 1944 5 Sheets-Sheet 4 A INVENTOR. A 1.55m- Mass/Maze.

. ATTORNEY.

May 13, 1947. o ss 2,420,380

METHOD AND DEVICE FOR WEAVING 0N LOOMS WITH GRIPPER SHUTTLES Filed March 9, 1944 S'SheetS-Sheet 5 I ALBERT MoEss/NsER.

Patented May 13,. 1947 ME'rnon AND mivren FonwEAvmG N f LOOMS wrrn GBIPPEB. SHUTTLES Albert Moessinger," Winterthur, Switzerland, as-

signor to Sulzer Freres, Societe Anonyme, Winterthur, Switzerland Application March '9, 1944, Serial No. 525,801

In Switzerland December 4, 1941 14 claims. (01. 139-126)- The present invention relates to a method'of and means for weaving on looms having a mu.- rality of successively picked gripper shuttles and stationary weft bobbins and in which the inserted .weft thread is cut at the edge of the fabric after it has been inserted into the shed and come to rest, and the end of the not inserted weft thread portion is held and transferred and connected to a shuttle to be picked later.

The present applicationis a continuation in part of copening application Ser. No. 454,916, filed August 15, 1942. I 1

An object of the invention resides in the provision of a method and means for picking a shuttle with the end of a weft thread connected there'- to into the shed while the end of the not inserted portion of a previously inserted weft thread is transferred to another shuttle, to be picked later,

whilst the latter shuttle is at rest.

.of the not inserted portion of the last inserted weft thread and transferring and connecting it to the shuttle arrested outside of the picking path, and of picking a shuttle with another weft thread connected thereto into the shed while the end the not inserted portion of the last inserted weft thread is transferred and connected to the shuttle which has been temporarily arrested outside of the shuttle picking path. 1

. Further, the'invention refers to a weaving having stationary weft bobbins, a. plurality of gripper shuttles, conveyor means returning the shuttles from the shuttle receiving to the shuttle picking side of the l0om, an'd cutting means cutting the weft threads at the edge of the fabric after their insertion, shuttle transport means transporting the shuttles from the conveyor means to the picking position and being laterally swingable for moving across the path of the returned shuttles and vertically movable for lifting same into the'shuttlepicking path, and a shuttle holding means holding a shuttle in a predetermined position while said shuttle trans port means move to receive another shuttle from said conveyor means.

A further object of the invention resides in the provision of a mechanism for gripping and holding the end of the not inserted portion of a last picked weft thread after it has been cut in the neighborhood of the edge of the fabric and transferring it to a position where it can be connected with a shuttle to be picked later.

Further and other objects of the present iii-- ioom for 2 vention will be hereinafter set forth in the accompanying specification and claims and shown in the drawings which; by way-of illustration, show what I now consider to be a preferred embodiment of my invention.

In the drawings? Fig. 1 is a diagrammatic perspective'showing .of the mechanism according to the invention.

Fig. 2 shows the mechanism illustrated in Fig. 1 in a subsequent operating condition. y

Fig. 3 shows the mechanism illustrated 1 and 2 in a further operating condition.

Fig.4 shows in a perspective view the mechain Figs.

nism for operating a member forming part ofthe mechanism shown in Figs. 1 to 3.

Fig. 5 is a diagrammatic showing of a shuttle picking and beating up mechanism in combination with a shuttle holding and transport mech-' anism'according to the invention. Referring more particularly to Fig. 1, the shuttle 9 has been brought into th lower part of the from the edge 13' of the fabric and givento the shuttle is held in tension by a thread tensioner Ill turned clockwise about fulcrum 16 under; the influence of a spring 1|.

The thread 3 is guided around two studs and held under tension between the shuttle l0 and thread brake 12. The plate type thread brake "12 determines the tension ofthe weft thread while .it is being inserted into the shed; the thre'adtensioner 10 determines the tension of the thread at rest after ithas been inserted. The tension produced by the brake 12 may be greater than the tension produced by the thread tensioner l0.

' Meanwhile a weft thread 2 has been drawninto the shed' by the shuttle 4. Theweft thread 2 of weft bobbin 8! isbr'aked by plate thread brake 'I'l sothat the spring 18 of the thread tensioner I9 is stretched. The shuttle 4, braked by brake H in the catch box, lies directly under the pusher l 2.

In the position ofthe mechanism shown in Fig. 2, the shuttle lifter 2| is brought into its vertical position by means of a mechanism comprising lever 84 fixed to'shaft I63 which is supported in adaasoo on cam 03. The shuttle lifter 2|, in its lowermost position, is swung through fork 42 of shuttle carrier 42 and, with its upper groove 23, takes hold of the shuttle I which was held in recesses at the ends of. the prongs offer]: 42'. The carrier 42 is 'reciprocatingly operated by a can: I! engaging roller 85 at one end of elbow lever 42, which lever is-swingably supported by shaft -20 and is connected with fork 42 by pin 44. Fork 42 is slidingly supported by a stationary rail 01 extending through slot 86 of the stem of fork 42.

The weft thread 2 which has beeh inserted into the shed at the operating phase shown in Fig. 1 is held by the thread gripper it of transfer mechanism I1 and is cut by shears it at the edge 12 of the fabric.

Part" of the shears I9 is pivotably supported on stationary pin 80, and the other part is operated by a mechanism comprising lever 0| pivot ably supported on the stationary axle 82 to which it is connected by link 83 guided in stationary guide I04. The free end of lever 9| is actuated by cam 90. During this time the shuttle 4 is pressed down by pusher I2 onto return conveyor it where it -is.seized by operator l4 of conveyor II and taken back to the picking side of the loom. The pusher I2 is actuated by lever 05 pivotably supported on shaft 86 and operated by cam 04.

In the position of the mechanism illustrated in Fig. 3, the shed formed by the warp threads I has been changed and the weft thread 2 has already been beaten into the fabric. The shuttle lifter 2| holding two shuttles 0 and II) was raised in such a way that the shuttle 9 comes to lie in the x 35 upward from lever I30.

position formerly occupied by the shuttle I i which had been picked. 1

Raising of the shuttle lifter 2| is done by lever 00, which is pivotably'supported at I00 and has one endswingably connected with the lower end of lifter 2|. The other end of lever 09 carries a roller 91 rollingon cam 98 which is operated by the loom drive.

In this way the shuttle I0 was brought from the thread receiving position 6| to the picking position 62, and the shuttle 9 into the thread receiving position 6|. The transfer mechanismhad gone upwards to the position shown in Fig. 2 until its thread gripper I 8, holding weft thread 2, is

outside the picking path I5; then it went back 50 (b) Member I1 is moved to the right by distowards and above position 6i. During this time the shuttle I 0 which holds the thread 3 was picked and now passes through the shed formed by the warp threads I. Clamp I 6 is then moved downwards to the thread transfer position GI, where the weft thread 2 is transferred to the shuttle 8.

when the thread 2 i held firmly in the shuttle 9, the transfer member I1 makes its return motion, while the thread 3 is carried further by shuttle I0. Member II, first, moves upward above the picking path I5, then in the direction of the pick towards the warp threads I upto the shears I9. Then the member I! moves downwards until its clamps can take hold of the weft thread 2 which has already come to rest in the position shown for thread 2 in Fig, 2. The weft thread is cut at the edge I3 of the fabric by the shears I 9 and the working process is repeated with the weft thread 2 in place ofthe weft thread 3.

In Fig. 4 the mechanism for operating member I! is shown. Member I! slides on-rail IOI which is rigidly connected to slide I02 by two arms projecting therefrom. The slide I 02 is moved up and down on columns I02 and I02" bya mechanism comprising arms I05 pivoted to slide I02 at I 08' and extending from shaft I01 supported in bear- 7 4 ings I06. A lever I04 is connected withshaftII'I havingafree end sliding oncam Illfixedtoshaft I03 which is driven by the loom.

Substantially between the up-and-down mo- 5 tions ofthe slide, the-member II makes a lateral motion. This motion is controlled by cam I00 and transferred byroller III to lever III which is rigidly connected to vertical shaft III. The shaft II2 vis pivotally supported in the base of 10 casing II3'and in bore II4 of the slide I02. A lever H6 is slidably connected with the shaft II2 by means of a key sliding in groove III. Lever 6 extends through window III of slide I02 and has a. forked end between the prongs of which 13 pin m rigidly connected to the member n is held.

Gripper I 6 on member I! consists of a gripper arm I rigidly connected to member I1 and of an arm I2I which is movably connected with 20 member I1. Gripper arm I2I is disposed at one end of torsion shaftfl I 0 which is revolvably supportcd'in ear I22 extending from member I1 and which shaft has a square-headed end I22 extending through a corresponding opening in ear I24 25 of the member I I. A control yoke I2! is rigidly connected with shaft H0. The torsional elasticity of the relatively long shaft III presses the gripper arm I2l against the stationary ipper arm I 20 and thus holds the thread.

When member I! comes down along line B-A immediately behind shears I0. grippers I20, I2I are opened over the weft thread 2 which has Just been inserted, due to the action of the control yoke I25 when running against a finger extending The gripp rs I20, I2I are closed on the weft thread when member II has reached its lowermost position and arm III is counterclockwise turned by a mechanism comprising a cam I26 fixed on shaft I20 which is 4 driven by the machine and a lever I", which isfirmly connected to shaft in rotatably supported in bearings I20 and carrying the finger levers Ill and III which are rigidly connected thereto.

After shears II which are operated in any conventional manner, have cut the weft thread at the edge of the fabric, member I'I begins its return journey, which takes place as follows:

(a) Slide I02 and with it member I'l travels upward by the distance A-B.

tance 3-0; the slide I02 remains thereby in its top position. I

(0) Slide I02 and with it member I'I descend for a distance 0-D until the grippers I 20, III

extend into the shuttle which is in position II for taking on the thread. i

. when the weft thread is firmly held in 9' of the shuttle 0, the control yoke I2! is turned counterclockwise by the finger of lever Itl and so the grippers are opened and the weft thread 2 is released and is now held only by the shuttle I.

When the'slide I02 moves upward with the return member I'I, the control lever I2! moves out of engagement with the finger of lever "I whereas by the clamps I20, I2I are closed by the tensioning force stored up in and caused by the twisting of the shaft II8.

Fig. 5 shows a shuttle picking and weft beat up mechanism in the podtion between the operating phases shown in Figs. 2 and 3. The shuttle 76 2I and is also held by the carrier 42.

Picker I32 which is in position ready to pick shuttle I0, is pivotably supported on the stationary axle I33. It is controlled by cam I34 cooperating with roller I35 which is pivotably supported by pin I36 rigidly connected to the beater I32. Thepicking force is stored in spring I31 which has been compressed during a counterclockwise motion of lever I32 due to the action of the specially formed curve I38 of the cam I34. Nose I39 of lever I32 abuts spring plate I40 which is rigidly connected to one end of rod Ill. The other end. of rod I4I slides in tubular member I42 to one end of which a plate I43 is attached on which one end of spring I31 rests.

The movement of thepicker is limited by a stop I44 which is yieldingly held in position by spring I45 wound around rod I41 having one end rigidly connected with stop member I44 and the; other end slidingly supported in stationary member I46.

Reed I48 is rigidly connected with slay I49. The slay I 49 is carried by a plurality of levers I50 which are swingably supported by stationary axle I52. The beating up of the weft thread by the reed I48 is controlled by cam I53 acting on roller I54 of lever I50. Cam I53 is mounted on desire to be limited to the exact details of designv and construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim: 1. The method of weaving on looms having a plurality of consecutively picked gripper shuttles and stationary weft bobbins and in which the inserted weft thread is cut at the edge of the fabric, characterized by the steps of gripping the,

end of the not inserted weft thread portion and holding it, and of picking a shuttle with another weft thread connected thereto into the shed while the end of the not inserted weft thread portion of the previously inserted weft thread is held.

2. The method of weaving on looms having a plurality of consecutively picked gripper shuttles and stationary weft bobbins and in which the inserted weft thread is cut at the edge of the fabric, characterized by the steps of gripping the end of the not inserted weft thread portion and transferring and connecting it to a shuttle, and of picking another shuttle with another weft thread connected thereto into the shed while the end of the not inserted portion of the previously inserted weft thread is transferred and connected to the first mentioned shuttle.

3. The method of weaving on looms having a plurality of consecutively picked gripper shuttles and stationary weft bobbins and in which the inserted weft thread is cut at the edge of the fabric, characterized by the steps of holding a gripper shuttle outside of the shuttle picking path, of gripping the end of the not inserted portion of the last inserted weft thread and transferring and connecting it to the shuttle held outside of the picking path, and of simultaneously picking a shuttle with another weft thread connected thereto into the shed.

4. The method of weaving on looms having a plurality of consecutively picked gripper shuttles and stationary weft bobbins and in which the inserted weft thread is out at the edge of the fabric, characterized by the steps of temporarily arresting a gripper shuttle outside of the shuttle picking path, of gripping the end of the not 1*??715, tion the last inserted weft thread and transferrin .nd connecting it to the shuttle arrested outside of the picking path, and of simultaneously picking a shuttle with another weft thread connected thereto into the shed;

5. In a loom for weaving having stationary weft bobbins, a plurality of gripper shuttles, conthe picking position, a weft transfer mechanism 7 transferring the end of the not inserted weft thread portion. to the weft thread receiving position, said weft transfer mechanism comprising a thread gripper and a gripper carrier supporting said gripper, and transport means removing said carrier with the thread end gripped by said gripper from the path along which said weft thread has been picked, carrying said carrier away from the edge of the fabric, and moving said carrier and gripper attached thereto to a shuttle in weft thread receiving position.

6. In a loom for weaving as set forth in claim ber slidably supporting said carrier, and guiding it substantially parallel to the weft thread be- .tween the position Where the weft thread end is gripped and the weft thread receiving position, a slide member supporting said rail member, su port means slidably supporting said slide member and guiding it and said rail member and said carrier to and from the path of the weft thread.

'7. In a loom for weaving as set forth in claim 5, said gripper having a member rigidly connected with said carrier and a member movably connected therewith and including yielding means yieldingly maintaining thread gripping engagement of said second member and said first member and a gripper opening member, actuating means connected with the loom drive and adapted to temporarily engage and actuate said grip-, per opening member and opening said gripper and releasing the thread gripped thereby.

.8, Themethod of weaving on looms having a plurality of consecutively picked gripper shuttles and stationary weft bobbins and in which the inserted weft thread is cut at the edge of the fabric, characterized by the steps of holding a gripper shuttle temporarily outside of the shuttle picking path for connecting a weft thread thereto, and of holding another shuttle with another weft thread connected thereto in picking posithread connected thereto into the shed while the end of the not inserted portion of a previously inserted weft thread is connetced to another shuttle to be picked later.

10. The method of weaving on looms having a lurality of successively picked gripper shuttles thread portion of the weft thread is held and transferred and connected to a shuttle to be picked later, characterized by the step of picking a shuttle with the end of a weft thread con- 4 8 14. In a loom for weaving as set forth in claim 11, said shuttle transport means having two shuttle support means, and an operating mechanism connected with and operating said transport nected thereto into the shed while the end of the not inserted portion of the last inserted weft thread is connected to the shuttle to be picked next;

11. In a loom for, weaving'having stationary weft bobbins, a plurality of gripper shuttles, conveyor means returning the shuttles from-the shuttle receiving to the shuttle picking side of the loom, and cutting means cutting the weft threads at the edge of the fabric after their in.. sertion, shuttle transport means transporting the shuttles from the conveyor means to the picking position and being swingable for moving across the path of the returned shuttles and movable for lifting same into the shuttle picking path, and a shuttle holding means holding a shuttle in a predetermined position while said shuttle transport me'ansfmove to receive'another shuttle from said conveyor means.

12. In a loom for weaving as set forth in claim 11, said shuttle transport means having two shuttle support means disposed above one another, the lower of said support means supporting a shuttle received from said conveyor meansand the upper supporting a shuttle for the pick.

13. In a loom for weaving as set forth in claim 11, said shuttle transport means having two shuttle support means, and an operating mechanism connected with and operating said transport means and placing one of said support means and placing one oi said support means into the path of the shuttles-returned on said conveyor means and receiving a shuttle, said shuttle holding means having a shuttle support portion, operating means connected with and operating said holding means and, when the other of said two support means is in the shuttle picking path, positioning said support portion adjacent the one of said support means which has receiveda shuttle, said operating mechanism withdrawing said transport means and thereby surrendering the received shuttle to said support portion of said holding means and then moving said transport means with said other support means adjacent said support portion, then said operating means withdrawing said holding means and surrendering the shuttle held in said support portion tosaid other support means, said operating mechanism then moving said transport means till the shuttle receivedirom said holding means is in the picking path.

ALBERT MOESSIN GER.

REFERENCES CITED The following references are of record in the file of this patent:

means into the path' of the shuttles returned on said conveyor means and then moving said transport means till the other of said support means is in the shuttle picking path.

UNITED STATES PATENTS Number Name Date r 1,161,979 Salisbury Nov. 30, 1915 2,089,620 Rossman Aug. 10, 1937 FOREIGN PATENTS Number 1 Country Date 179,034 Switzerland Dec. 2, 1935 

